Joel ettinger



(No Model.)

J. ETTINGER. ROTARY CUTTER.

No. 529,114, Patented Nov. 13,1894. 7

1/05: [Tr/mask, @y 7x8 ziz drvw ys HE no'ams PEI'ERS m1 momumu.WASHINbTON a c ments, and the subject-matter claimed are provided forholding the collars, bits and on a supporting spindle.

NITED STATES PATENT 5OFFIQE JOEL ETTINGER, OF MILTON, PENNSYLVANIA,ASSIGNCR TO THE JOEL B. ETTINGER MACHINE COMPANY, LIMITED, OF SAMEPLACE.

ROTARY CUTTER.

SPECIFICATION forming part of Letters Patent No. 529,114, dated November13, 1894.

Application filed Math 15,1894.

[0 aZZ whom it may concern.-

Beit known that I, JOEL ETTINGER, a citizenof the United States,residing at Milton, in the county of Northumberland and State ofPennsylvania, have invented certain new and usefulImprovements in RotaryCutters, of which the following is a specification.

My invention relates to that class of reversible, rotary cutters inwhich the bits or cutters are pivotally supported, and have a slightmovement on their pivots, to adjust them so that their cutting edgesshall be projected forward while their faces in rear of the workingedges shall be thrown back out of the way to afiord the requisiteclearance, and thus prevent binding or undue friction An example of thisclass of cutters is shown in the expired patent of Daniel Stanley, No.125,765, granted April 16, 1872. In that patent, the bits are heldbetween two collars and loose pivot pins enter recesses in the bits, andin the collars, and permit the bits to have a slight pivotal movement. Aclamping nut. is

pivot pins in place.

According to my invention, Iprovide a support for the cutters havingparallel flanges rigidly connected together, and between the flanges Ipivot the arms or shanks of the bits or cutters. By this arrangement,the bits, while being held in proper operative position, are not clampedin such manner as to prevent their free movement on their pivots at theproper time, as would be the case in the use of a cutter such as shownin the Stanley patent above mentioned.

The details of construction of my improvehereinafter designated.

In the accompanying drawings-Figure l is a perspective view of a cutterconstructed in accordance with my invention, and mounted Fig. 2 is asection on the line 2-2 of Fig. 3. Fig. 3 is a section on the line 33 ofFig. 2,and Fig. 4 is a view of a modification.

I prefer to employa thimble as the support for the bits or cutters.

As shown in Figs. .1, 2, and 3, the thimble A is supported on a spindleB, in any suitable way, and is held firmly in place by collars C,

Serial No. 503,759. (No model.)

and a nut D, fitting the screw-threaded end of the spindle. The thimble,as shown, is hollow, being formed with a central sleeve a, and parallelend flanges a, of a sufficient depth to accommodate the shanks or armse, of the bits or cutters E. Pins F, extend through the flanges aandthrough the shanks e of the bits, passing loosely through the latter, sothat they may have a free pivotal movement.

The bits may be of any suitable form. As shown, they have inclined,beveled cutting edges e,and extend outwardlyin an inclined directionfrom the shanks, which project into the space between the flanges of thethimble, and are pivoted thereto, as above stated. The inner ends of theshanks are each prolonged into two branches and curved around thethimble, their inner ends coming close together with only narrow spacesa; and y be tween them. By this organization, the bits are held firmlyin proper working position, without undue pressure upon the shanks. Thecutter may be revolved in either direction, and the bits will quicklyand automatically shift to accommodate the changed motion. The adjacentends of the shanks at a; or

.y coming together limit the adjustment of the cutters and take thestrain.

When in operation, the cutting edge of each bit will be projectedforward so as to operate upon the stock in the most efficient way, whilethe outer curved surface ,2 of each cutter will be thrown backcorrespondingly so as to provide the requisite clearance, this surfaceof the bit being held away from the stock and not coming in frictionalcontact therewith.

In Fig. 4, a slight modification is shown; In this instance, instead ofemploying a hollow sleeve, I provide the support for the cutters with astem H, adapted to be secured in the socket of any suitable supportingdevice in the driving mechanism.

My improvements mainly relate to the novel way of mounting the bits orcutters in a pivotal support.

It will be observed that the support of the bits is permanentlyconnected to them; that is to say, when the cutter is removed from aspindle, the sleeve or support is removed with the cutters instead ofbeing separately removed, as is the case in the construction shown inStanleys patent above mentioned, where the collars are loosely connectedwith the cutters and are removed separately from 5 the spindle. Notonly, therefore, is my improved rotary cutter compact and readilyattached to and detached from the driving mechanism, but when inoperative position, the cutters are held in the most eflicient man- IOner so that they may adjust themselves to the best working position. Iclaim as my invention- 1. A rotary cutter comprising one or more bits orcutters having shanks and a support JOEL ETTINGER.

Witnesses:

J 0s. ANGSTADT, WM. 0. MILLER.

